Blood Glucose Test Strips Technology

الوصف

Blood Glucose Test Strips was constructed from two electrodes, one carbon (the working electrode), and one a mixture of silver and silver chloride (Ag/AgCl, a combination electrode serving both as the counter electrode and as the reference electrode). The working electrode was also coated with a mixture of ferrocene (mediator) and glucose oxidase (enzyme). The electrodes were exposed, unlike current EBGTS, which generally enclose the electrodes in a thin capillary chamber. Therefore the required blood volume (about *0 µl) was much larger than that used by today strips. The test time, *0 seconds, was also considerably larger than the ***0 seconds common today. A series of continuous innovations has led to the much improved performance available today.

Figure 4 shows a representative sample of currently available electrochemical test strips, which vary somewhat in size, but are generally about an inch long and 1/4 inch (about 6 mm) wide. This size is dominated by ergonomic (handling) concerns, since the actual sample chamber (which fills with blood) is only a few mm long, and is located at the top of the strips in Figure 4. The other (bottom) end of the strips contains electrical contacts for communicating with a blood glucose meter.